Comet Roundup
Comets may have provided the young Earth the molecules necessary for the formation of life.
Space Exploration
Life Light
The way light scatters off distant planets may reveal whether life exists on them.
Rockets & Ozone
Possible increases in rocket launches could affect the Earth's protective ozone layer.
Little House on the Moon
Swedish engineering students have teamed up with an artist to build a small cottage on the Moon.
Star Distance II
Astronomers calculate the distance to the furthest stars by comparing them to stars they know.
Star Distance I
Astronomers use a concept called parallax to calculate the distance to the nearest stars.
C02 in Space
Astronomers have detected carbon dioxide on a planet outside our solar system for the first time.
Space Ship Gravity
Spinning spaceships could create artificial gravity in principle but not in practice.
Lake on Titan
Scientists have confirmed the existence of a large, liquid lake on Saturn's moon Titan.
Weighing Black Holes
A new technique helps scientists measure the mass of giant black holes.